I wish we could learn to show greater respect to those who are different from us. (If we could learn how to have greater understanding too, that would be even better, but maybe it's not possible to really understand people who are different from us, or whose life experiences are very different from ours.) It's something I have always tried to do, and I can reasonably claim to have had some success, but nowhere near 100% success.
The problem is basically one of biology. Humans evolved in a world in which we spent almost all our time in our own small group (typically 10 - 50 people). We evolved to be very wary of anyone from outside that group, anyone a bit "different", in case they might be a threat - because they often were. But what helped us to survive back in the Stone Age is now a liability. Today, someone different from me is very unlikely to be a threat to me, but the biological response to anyone different is so deep-seated that it keeps surfacing even when we don't need it. The way I deal with it is to accept that prejudice against anyone very different from me is a natural response, and is going to happen sometimes, so I shouldn't feel uncomfortable with myself if I start to feel it, but I do have an obligation to then suppress that primitive response and respond in a more rational way.